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Interface
1. There is TTL serial port (Tx/RX) or OTG from 10 pin usb connector
pls see the above schematics of our USB connector in our PND, it is 10 pin connector.
Pin 4 and 6 can be used for USB or TTL serial interface (Rx/Tx) and Pin 8 is ID pin which is used to
distinguish for USB or serial interface.
if it is connected to GND, then the pin 4 and 6 will be Rx/Tx interface.
if it is connected to Vcc, then the pin 4 and 6 will be D- and D+.
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10pin usb connector
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